Support Autorest.Python 3.x LRO leak (#42)

* Support Autorest.Python 3.x LRO leak

* PyLint happyness

src/azure_devtools/scenario_tests/base.py

@@ -141,8 +141,12 @@ def setUp(self):
 
     def tearDown(self):
         os.environ = self.original_env
+        # Autorest.Python 2.x
         assert not [t for t in threading.enumerate() if t.name.startswith("AzureOperationPoller")], \
             "You need to call 'result' or 'wait' on all AzureOperationPoller you have created"
+        # Autorest.Python 3.x
+        assert not [t for t in threading.enumerate() if t.name.startswith("LROPoller")], \
+            "You need to call 'result' or 'wait' on all LROPoller you have created"
 
     def _process_request_recording(self, request):
         if self.disable_recording:
@@ -190,7 +194,7 @@ def _process_response_recording(self, response):
     @classmethod
     def _custom_request_query_matcher(cls, r1, r2):
         """ Ensure method, path, and query parameters match. """
-        from six.moves.urllib_parse import urlparse, parse_qs  # pylint: disable=import-error
+        from six.moves.urllib_parse import urlparse, parse_qs  # pylint: disable=import-error,relative-import
 
         url1 = urlparse(r1.uri)
         url2 = urlparse(r2.uri)

src/azure_devtools/scenario_tests/preparers.py

@@ -96,7 +96,7 @@ def remove_resource_with_record_override(self, name, **kwargs):
 class SingleValueReplacer(RecordingProcessor):
     # pylint: disable=no-member
     def process_request(self, request):
-        from six.moves.urllib_parse import quote_plus  # pylint: disable=import-error
+        from six.moves.urllib_parse import quote_plus  # pylint: disable=import-error,relative-import
         if self.random_name in request.uri:
             request.uri = request.uri.replace(self.random_name, self.moniker)
         elif quote_plus(self.random_name) in request.uri: